Ink.



4 UNITED. STATES PATENT OFFICE.

WILLIAM D. PATTEN, OF NEW YORK, N. Y.

INK.

No Drawing.

To all it may concern.-

Be it known that I, W11 LIAM D. PA'rrnN,

a citizen of the United States, and a resident of the borough of Manhattan, New York city, State of New York, have invented certain new and useful Improvements in Inks, of which the following is a specification.

This invention relates to a new and useful improvement in inks with particular relation to printing or-lithographic inks of that class known as transparent printing or lithographin inks, 1 although the im- %e used in connection with other printing or lithographing inks than those which-are transparent. Heretofore in connection with the manufacture of printing or lithographing inks of the general class described a certain grade of hydrate of aluminum produced by neutralizing a solution of sulfate of aluminum with an alikali has been largely,

used because when mixed with linseed varnish the mixture becomes substantially transparent. When hydrate of aluminum is mixed with pigments in combination with inseed varnish it acts as a diluent admitting of the spreading of a given amount of pigment over a greater surface Without im-- pairing the quality of the color as would be the case with any substance lacking the quality of hydrate of aluminum of becoming transparent. A mixture of linseed varnish and hydrate of aluminum is also used by printers to reduce the inks used by them when the inks are found to be thick or tacky. One variety of printing or litho graphing ink, so called, comprising linseed varnish and hydrate of aluminum is commonly known in the art as transparent white.

I have discovered that phosphoric acid [in chemical combination with aluminum,

such as a phosphate of aluminum prepared as hereinafter described, has a greater transparent quality for the purposes described than the commercial hydrate of aluminum. It is therefore superior to hydrate of aluminum for the purpose described and other analogous uses. Phosphate of aluminum prepared as hereinafter described for example, having substantially the same physical qualities as hydrate of aluminum may be substituted for the latter in many of its uses.

Specification of Letters Patent. Patented Aug. 13, 1912.. Application filed July 1, 1910. Serial No. 569,882.

In order to more fully describe my invention I shall set forth in the. following one means of producing-a chemical combination of phosphoric acid and aluminum, although it is obvious that it may be produced, in other ways and the principle of my invention is not afit'ected by the manner of production of aluminate of soda and tribasic phosphate of-soda. This solution is then neutralized with monobasic phosphate of soda or a substantially pure phosphoric acid, the amount of monobasic phosphate of soda or phosphoric acid to be added to be determined by the usual test for neutralization. I prefer to use monobasic phosphate of soda because it is cheaper. The addition of the monobasic phosphate of soda, for instance,

to the solution described results in the pro-- duction of dibasic phosphate of soda in .so-

lution and a precipitate of a double saltof phosphate of aluminum and soda. A sample of the phosphate of aluminum produced Ihave'found to analyze as follows: A1 0 26.08.; Na O, 12.77; P 0 37.75; H O on ignition, 19:2 Potash may be used in place of the-carbonate of soda in the roasting process and acid phosphate of ammonia or acid phosphate of potash may be used instead of monobasic phosphate of soda in the neutralization step of the process. In any case the resultant precipitate has the quality of becoming transparent for the purpose described, even though the chemical compound varies according to the method of preparalimit myself to the use of pure or substan-. I

tially pure phosphate .of aluminum for the purpose described as it may contain more or phoricacid, or other chemicals or impurities incidental to its manufacture prov ding that the resultant product has the quality of becoming transparent to make it useful in the arts for the pur ose described. In using the term phosp claims I mean to include within such term, a monobasic phosphateof soda, or other suitable alkali, as such is s mply phosphoric acid partially neutralized.

What I claim and desire to secure by Letters Patent is:

1. An ink containing an ink vehicle,- a pigment and phosphoric acidin chemical combination with aluminum.

2. An ink containing an ink vehicle, a pigment and phosphoric acid in chemical combination with aluminum and an alkali.

3. An ink containing an ink vehicle, a pigment andphosphoric acid in chemical combination with aluminumand soda.

4. An ink containing an ink vehicle, a.

pigment and the precipitate produced by neutralizing a solution of aluminate of soda with phosphoric acid.

5. An ink containing linseed varnish, a pigment and the precipitate produced'by oric acid in the neutralizing a solution-otaluminateof soda with phosphoric acid.

6. A transparentwhite ink containing an ink vehicle and phosphoric acid in chemical combination with aluminum.

,7. A transparent white ink containing an ink' vehicle and phosphoric acid in chemiial combination with'aluminum and anal- *ali.

8. A transparent white containing an ink vehicle and phosphoric acidin chemical combination with aluminum and soda.

9. A transparent white ink containing an ink vehicle and the precipitate produced by neutralizing a solution of aluminate of I soda with phosphoric acid.

l A transparent white containing linseed varnish and the precipitate produced by neutralizing a solution of aluminate of soda with phosphoric acid.

In testimony whereof I have signed this I specification in the presence of two sub scribing witnesses. I c

WILLIAM DQPATTEN. Witnesses:

K. G. Lnann, Saanonr G. MABTICK. 

